Granted Patent
Utility
US 6,563,814 · App. 09/056,367
Method and apparatus for controlling the operation of a digital telephone switchboard
Inventors:
Ray Rowan, Barry O'Sullivan, Barry K. McGuire
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Apr 7, 1998
Inventors
Ray Rowan
Barry O'Sullivan
Barry K. McGuire
Assignee (at issue)
Nortel Networks Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.